Relief-valve.



R. C. ENYART..

RELIEF VALVE.

APPLICATHIN FILED FEB. |9| 1917- .1,235,019. Patented July 31,1917.

I Haw/76f B M/"f W'1tness; Inventor fiwym 5 %W 006% Attorney UNITED STATES PATENT OFFICE.

RALPH C. ENYART, OF CONNERSVILLE, INDIANA, ASSIGNOR TO THE I. I-I. & F. M. ROOTS COMPANY, OF CONNERSVILLE, INDIANA.

RELIEF-VALVE.

Application filed February 19, 1917.

To all whom it may concern:

Be it known that I, RALPH C. ENYART, a citizen of the United States, residing at Oonnersville, Fayette county, Indiana, have invented certain new and useful Improvements in Relief-Valves, of which the following is a specification.

This invention relates to improvements in that class of valves employed for the relief of the excessive pressure of fluids subject to pulsations of pressure, and the invention will be readily understood from the following description taken in connection with the accompanying drawing which is an elevation, partly in diametrical section, of my improved relief valve.

In the drawing 1, indicates a hollow cylindrical valvebody having an opening in its roof:

2, a valve-seat forming the margin of the top opening of the body and presenting upwardly:

3, an inlet to the interior of the body, the illustration showing this inlet as being disposed through the fioor of the body, though an opening into the side of the body will answer the same purpose:

4, a valve seating downwardly upon the seat 2:

5, a stem projecting upwardly from the valve:

6, a pile of weight-disks disposed loosely upon the stem and forming an adjustable load upon the valve to hold the valve normally closed:

7, a cylinder open at its top and closed at its bottom and disposed within the valvebody below the roof and inwardly of the sidewall thereof, a bore of this cylinder being not greater than the bore of the valve-seat:

8, a piston working freely in the cylinder:

9, a neck rigidly connecting the piston with the valve:

10, wings connected with the neck and piston and valve and forming an additional connection between the piston and valve, the exterior of these wings fitting the valveseat after the usual manner of valves of the wing type: and

11, the space surrounding the cylinder between the cylinder and the side wall of the body, this space being in free communication with the inlet 3 and in free communication with the top of the cylinder.

Specification of Letters Patent.

Patented July 31, 1917.

Serial No. 149,475.

The piston works freely in the cylinder and is without packing, thus permitting some degree of leakage into the bottom of the cylinder, under the piston. In case of excessive pressure the valve rises and opens, against the resistance of the load represented by the weights which are assumed as having been adjusted for the degree of pressure at which the valve is to open. When the valve is open then fluid finds its way to the bottom of the cylinder and when the valve closes it does so against the resistance of the fluid penned up under the piston and the valve will close with such deliberation as is imposed upon it by the necessity for the leakage of fluid upwardly past the piston, thus producing a dashpot efiect to check the sudden closure of the valve and its hammering upon its seat. In cases where the pressure is subject to very frequent rises above the normal, thus calling for the opening of the valve for the relief of the pressure, the deliberateness of movement enforced upon the valve by the piston prevents the annoying dancing of the valve in response to sudden pulsations of pressure.

The valve and piston can be readily lifted out of the valve-body without the necessity for removing other parts, and the structure presents the maximum of efficiency and simplicity.

I claim A relief valve comprising, a valve-body provided with an inlet and with an opening in its roof surrounded by an upwardly facing valve-seat, a cylinder vertically dis-' posed within the valve-body concentric with its roof-opening and spaced away from the side-wall of the body and open at its top and closed at its bottom and having a bore not greater than that of the top opening, an imperforate piston disposed within the cylinder, a valve seating downwardly upon the valve-seat, a rigid connection between the valve and the piston, and means for providing the valve with an adjustable load to hold it normally closed, combined substantially as set forth.

RALPH C. ENYART.

Witnesses GLEN ZELL, WILLIAM J. CAIN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

